gitlab.gnome.org/GNOME/gimp/ Take your bugs here
developer.gimp.org GIMP developers website
gui.gimp.org GIMP UI redesign Wiki
docs.gimp.org GIMP documentation
registry.gimp.org Plug-ins & scripts
gimpmagazine.org GIMP Magazine by Steve Czajka
gimpfoo.de Personal blog of Michael Natterer, GIMP’s maintainer
vidar.gimp.org Author of GIMPressionist and Fire Annimation plug-ins